Electromagnetic signaling device



y 1934- E. o. ZWIETU$CH 1,966,476

ELECTROMAGNETIC SIGNALiNG DEVICE Filed July 31, 1930 FIG. 2

/Nl/ENTO/P E. 0. ZWIETUSCH BY 'mwbam ATTO/PNEY Patented July 17, 1934 1 smwmenmw Eduard Zwietu sch, Vienna, ustria, assignor I NewiYdrk, Y-.',a; corp0ratioh' New York exact. adjustment of the armature n sieri es o this-type...

Another object of this invention is to facilitate the ad ustment o the armatureso. that the d A vices....w.ii1=b,e resnonsiile owmpara vely wea .cnrrentsand the a ma ur w l v br te wi h suffici nt amplitud at al t mes, to roduce sige pals-of; desired in ensi y a E e p incipal eatures of th i er o thi inventi n wi l, be a par nt f om t e tc w nsz Instead of t e perma ent ma net Qffr ther comp ica ed ben form ommon y emp ed heretofore. up n whic the pqlerp s es. re ta te enedby bo a. he sier 1 1 device of his invenon emp oys. a impleb c-ma n uiqohwhich th DD1rPi W-I mounted; by. conne ti plates or dis laceab elusa his e ables. a rou h .ediuetm nt 9 he a mature by sh f n the posit on o the c nnec n pla e r. hiss alone-th ba ma net; fine and exact ad: iiistment is ac ompl shed n'ac ord nce wi h thi inve tior .L eather spring ,h ch 99 9-. eratescwith arma ure sup ortin sp i g and whosedee eorfi rure s r ied by art scr w- The head of said rew. be re qlar yslotr t a. may h ve. twqho es herein. ma he hex gonal-.11.: .In .accordanc with another fea u e Ogf this i ven i n. a sa is ac o ma neti flu); a h is ohta ned-iby nrovidin the arma ure an the a J'acent noleg-pieces with lar e onti u us flan e and by eliminating all b.ol.ts. and associated pieces from the magnetic fiux'path.

accordance withi'aifuiither feature of this invention, the armature is simply pivoted in sockets and may be easily mounted, demounted, and manufactured. In accordance withstill another feature, a ringer which is normally employed as an alternating current ringer may be readily converted into a ringer operable by pulsating direct ourrents of eith r polarity by a simple flat spring.

Similarly, such a direct current ringer may be converted into an alternating current unitby means of a simple auxiliary spring which disengages the first mentioned spring from the armature. It is thus possibleto use the ringer of this invention for both alternating current and pulsating direct current systems.

Application July 31, 19st, serial N A 'f WQWEPQPQ .25;

7 Claims. (ar a-"1) I In th cc mp i drawin El e. .1 is f nt iew of h 'rin r;

Eis z d iiarecsid and bot om vie s. re: spect ely; h M' Eiges orz a rin er 9r ulsati11e di t my: 60. rents. embody he afo ementioned-fiat s rin .E 5. hows how the fl pri en ered no er tiv b a auxil ar s in so that, the ringer: is o e able, y. al ernatin u rents; a d

. Fi s- .6. a d. 7. s de nd plan; i'ew re e 'e I ti el p the a xi r r s ow in ite-.- Ihe rin e compri es two coflc resl and 9911s moun ed t rei a flat lem ece i m unt d on ea a m t re ore a t e en are ce t t e a m tu T e le-Images ha e a e te c oss-s c n h h coi cores and thereb in a ia o ble flux. h. t the a ma ur "Th othe ends Of e cor are m he ca lycq ect d in t e usu l. i ann b e pole-piece 4 upon which the gong supports Z5 and the gongs 6 are mounted. 'lfhe pole-piece 4 is dil sta ly at ach d to: the erma ent b ma n t 22.1w h dis l cee le 1. 1% o con ec in plate? an se st aws 8 b l one .of whi h shar Th eth r an 0 he P rm ne i 89 net is similarly connected to a tther 515 piece 23 by? li l 9 and screws "'Ihe last ature 25, which consists of a single piece of iron having a flange 18 at each end, is provided in the center with trunnions 17 projecting into apertures in the armature supporting. spring 12. The-armature carries the hammer rod 18 which mounts the hammer 19. The flanged overlapping ends 24 and 16 of the pole-piece and the armature 25 respectively in conjunction with the large pole-pieces 3 provide efiicient magnetic .105

The armature may be adjusted in two ways.

It may be adjusted approximately by shifting the pole-piece 23 carrying the armature 25 along the bar magnet 22 and thereby varying its position with respect to the coil cores; a further adjustment is obtained by rotating the regulating screw 11 which causes a displacement of the armature supporting spring 12 and makes possible very small variations in the position of the armature with respect to the polepiece 23. The most satisfactory and eflicient position of the armature is thereby obtainable.

The ringer described hereinabove and shown in Figs. 1 to 3 inclusive is adapted for operation by alternating current. It is oft times desirable and necessary to transfer a ringer from an alternating current circuit to one wherein only a pulsating direct current is available for ringer actuation. In accordance with a feature of this invention, a telephone ringer of the general construction described hereinabove; may be easily converted from one operable by alternating currents to one operable by pulsating direct current or vice versa. As shown in Fig. 4, a hook shaped spring 20 is secured at one end between the base of the armature supporting spring 12 and the span spring 14 by the screw 11. The other end of the spring 20 bears against one. of the flanges 16 of the armature 25 so that the ringer is biased for and operable only by currents of a polarity such that the armature will be actuated in a direction whereby the flange in engagement with the spring 20 is lifted away from the spring. The ringer may be reconverted for use on alternating current circuits, as shown in Fig. 5, by a tri-armed rider spring 21, shown more clearly in Figs. 6 and '7, which is sprung on one arm of the span spring 1d and forces the end of the spring 20 out of engagement with the adjacent flange 16 on the armature. When not in use the rider spring 21 may be sprung on the span spring 14 at a portion thereof remote from the spring 20 as shown in Fig. 4.

What is claimed is:

1. An electromagnetic signaling device comprising a magnet, a pole piece attached to said magnet, an armature, and means supporting said armature adjacent said pole piece, said armature and pole piece each comprising a member having an angularly extending flange portion at opposite ends thereof, the flange portions of the armature being contiguous to the flange portions of the pole piece.

2. An electromagnetic signaling device comprising a bar magnet, a pole piece attached to one end thereof, a supporting member mounted on said pole piece, an armature pivotally mounted on said supporting member, a cantilever spring engaging said armature for preventing substantial rotation of said armature in one direction but allowing rotation thereof in the opposite direction, means supporting said cantilever spring, and means insertable between said pole piece and said spring for rendering said cantilever spring ineffective.

3. An electromagnetic ringer comprising an electromagnet having a pole piece, a supporting structure mounted on said pole piece, an armature adjacent said pole piece pivotally supported on said structure, a cantilever spring member attached to said supporting structure, the free end of said spring member being adapted to engage one end of said armature, to resist displacement thereof in one direction while allowing displacement thereof in the opposite direction, and movable means reacting between said spring member and said supporting structure for disengaging the end of said cantilever spring from said armature.

l. An electromagnetic ringer comprising a permanent magnet, an L-shaped pole piece aflixed to one end of said magnet, a pair of parallel coils and cores therefor mounted on said pole piece, another L-shaped pole piece afiixed to the other end of said magnet and having flanges extending adjacent said cores, and an armature supported from said second mentioned pole piece and positioned between said flanges and cores, said armature having flanges contiguous with the flanges on said second mentioned pole piece. 1 g

5. An electromagnetic ringer comprising a bar magnet, a pole piece adjustably mounted on one end of said magnet, a U-shaped supporting member having its base adjacent said pole piece, a bowed leaf spring spacing said supporting member from said pole piece, means for displacing said supporting member relative to said 1" pole piece against the tension of said spring, an armature pivotally mounted between the arms of said supporting member, and a leaf spring locked to said supporting member by said means and engaging one end of said armature.

6. An electromagnetic ringer comprising a magnet having a pole piece, an armature mounted in operative relation to said pole piece, means for biasing said armature, said means comprising a spring at one end engaging said armature and being fixed at its other end, and an auxiliary spring for disengagingsaid biasing spring from said armature to enable conversion of said ringer for use with direct current or alternating current at will. Y

'7. A signalingdevice comprising a magnet, a pole piece for said magnet, an armature, and means for'mounting said armature in operative relationship with said pole piece, said armature and pole piece having spaced intermediate supporting portions, and contiguous flanged end portions extending at angles to said supporting portions.

' EDUARD O. ZWIETUSCH. 

